"A",
"B",
"C",
"D",
"E",
"F",
"G"/"H",
"I"/"J"/"K"/"L",
"M"/"N"/"O",
"P"/"Q",
"R",
"S",
"T",
"U"/"V"/"W"/"X"/"Y"/"Z"
Magnetic {H} Field: The field produced when current flows through a conductor or antenna.
Main Lobe: The lobe containing the maximum power in an antenna radiation pattern.
Antenna Main Lobe
Major Lobe. The lobe in which the greatest amount of radiation occurs. See Main Lobe.
Marconi antenna: A quarter-wave antenna oriented perpendicular to the earth and operated with one end grounded.
Maximum usable frequency: The highest frequency for a given elevation angle that will reflect from an ionospheric layer. Also called MUF.
Megahertz: One million cycles per second. Also called MHz.
MLPV: Mobile Low Profile Vertical Antenna
Mobile Antenna: --- Text in Review.
Modulate: To change the output of a transmitter in amplitude phase, or frequency in accordance with the information to be transmitted.
Monopole antenna: An antenna with a single radiating element; a whip antenna. [Whip Antenna graphic below right]
Multipath: The multiple paths a radio wave may follow between transmitter and receiver.
Near Field: A region generally in close proximity to an antenna or other radiating structure in which the electric and magnetic fields do not exhibit a plane wave relationship and the field strength does not decrease proportionally with the distance from the source but varies considerably.
Node: The fixed minimum points of voltage or current on a standing wave or antenna.
Noise: Random pulses of electromagnetic energy generated by lightning or electrical equipment.
Nutating: Moving an antenna feed point in a conical pattern so that the polarization of the beam does not change.
Offset angle: The angle at which a long wire antenna must be aimed on either side of the direction to the base station.
Omnidirectional antenna: An antenna whose radiation pattern shows equal radiation in all horizontal directions.
Oscillation: A periodic, repetitive motion or set of values (voltage, current, velocity).
Out of phase: Two alternating quantities not passing through corresponding values at the same time (e.g., if the current in a circuit reaches its maximum value before or after the applied voltage does, the current is out of phase with the voltage).
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Antenna "P" and "Q" Terms
